Valve for engines.



J. F. HOPPER. VALVE FOB ENGINES. APPLICATION mum OCT. 10, 1908.

Patented Jan. 26, 1909.

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vrtva'ron, ansmasg specification of Letters Patent. Applleatlon attenuator-10,1906. awn Ho. sumac Patented Jan. 26, 1909.

statebfTexas, have invented certain new and useful rovements in Valves for -Engim'es, of who the following is a specifica- This invention relates to valves for recipto be propelled by steam and is equally ap licable to e es runnmgiat a slow or a big rate of spec and arming any kind of work; and it consists in certain novel features hereinafter fully set forth and claimed, the object being an im- Miss will be read D communicatin t'wthe face 0' of steam chest by vement over the slide valve or expensive hse'ty'pes, thereby produce a simple, cheap, and 'efiectlvedevice ;of this character.

The nature and o eration'of the improve understood b those :lrilled in the art from the following escripion.

Inthe accompanying drawings, Figure 1 represents a plan view, partly in section, of 9n engine fitted with my device. Fig. 2 represents one end of the face of a steam chest and port for use with the same. Fig. 3 is a section on the line 1 1 of Fig. 2. Fig. 4 represents a port late that is secured to the face ofthe steam c est. Fig. 5 is a section on the line 2 2 of 4. Fig. 6 represents one end of the-opposlte side of the port plate shown in Fig. 4. Fig. 7 represents the face of a rotary valve.- Fig. 8 is a section of Fig. 7 through the line 3 3. Fig. 9 is a section of Fig. 7 through the line 4 4. Fig. 10 re resents a plan view of the reversing va ve. 11 is an edge view of the same, and Fig. 12 represents a governor connection for regulating the steam su ply.

In the drawing represents an ordinary double acting steam cylinder shown 'connected in the usual way to the shaft B. The

linder has a common steam chest 0 in which the exhaust steam only enters. At each end of the steam chest face 0' is a port with the interior of the he port plate E Mound bolts passing through holes F and into holes F the latter being threaded. One and only of the port plate E is shown, but both ends are fitted with the same parts so a descnption of one -cylinder.

.of steam chest 0 w will sufii e for both. Centrally located and near -eac end of the plate E are four rectangular port openings at a b and c all drverg to a shorter o enin on the o o site s i e of the plate a s indicatedi 811 3111 from the boiler is supplied to the pgrts b and c res ectively as the engine is to run forwar or backward through the steam pipe G which is connecte centra ly near the bottom edge of late E at a oint indicated by G, from w ich point e annels G extend in either direction to cylindrical 0 (an s H that pass through the (plate E. ear 'oth ends of the op osite si e of plate E are annular grooves d, the one radially exterior to the other, they are separated by an annular ring 0 and closedby a wall e; these grooves o 11 respectively in ports I) and 1; through slg tfl extending through'the wall of the plate In these grooves d d are loosely fitted segmental sections 9 g. The section g is provided with cogs extending across its inner face and the section 9 has cogs on its outer edge as shown in Fig. 6 and the pinion h turning loosely on the pin 1'. engages with the cogs of both sections and also with a vertically actuated rack j rovided with a stem 7: that passes out throng the top ere they are connected to an arm I that is aperated b a governor J and bywhich, shoul the spec of the engine in-. crease one stem 7c would be forced down, and the other stem corres ondingllly raised, moving the sections 9 an 9' int e direction indicated b the darts; thus decreasing the amount 0 steam admitted to the engine, and vice versa should the speed of the engine decrease. The position of the sections 9 g at a the o posits end of the port late (not shown being reversed admits oft e upward movement of the rack 7', operating them inconformity with the section shown.

The rotary valve K has a steam chamber L and is provided with an opening M through its face which rrla gisters with the opening H of the port plate and when the engine 18 111 operation said chamber is always full of live steam which is supplied through the channels G.

m is a steam port extending through the face of valve K to the chamber L, t rough which port, as the valve is rotated, steam is supplied from the chamber L to the engine through either the plate slot f or f as the engine ma be desired to run forward or backward. he rotary valve has two exhaust ports N and N radially cxteriorly one to the other, they pass throi "h the valve from one side to the other, and receive the exharst steam from the engine throrgh the plate ports a or a according to the direction the engine may be running, and conduct the exharst steam into the steam chest C, from whence it asses throrgh exit 0 Fig. 1 which Ina be p aced at any desired oint. Centra ly located within the outer side of the rotary valve is a square socket P, somewhat less in depth than the wall of the valve. In this socket the square end of a stem n enters and is loosely fitted, the stem from the socket outward is round, and extends through the side of steam chest which is provided with a suitable stuffing box, and thence through a bearing 0 that may be supported by a bracket attached to the steam chest. To the outer end of the stem is secured a bevel gear 19, engaging with a pinion 73 secured to a shaft Q, that is su ported by a bearing and bracket It also attac ed to the steam chest; and thence, in line with the engine, the shaft extends throrgh bearing S where it is provided with a pinion p that engages a bevel gear p attached to the engine shaft B. Ihe bevel pinions on the shaft Q being one half the diameter of the bevel gears on the engine shaft and valve stems will obviousl revolve the rotary valves synchronously with the engine shaft B.

If found necessary, spring adjustment, regulated by screws q may be utilized to insure the seatin of the rotary valves against the ort plate h or any well known steam met od ma be employed for the purpose. At both en 5 of the port plate E, on the side that rests against the face of the steam chest, a recess T is provided in which valves U are fitted; these valves have two ports 1" r corresponding in width and length to the ports a a. and c in the port plate, but spaced a greater distance apart, when they are drawn outward, so the opening r registers with the plate ort a, and r with ort b, the rotary valve 111 its passage will at mit steam to the cylinder throrgh its port in into port I) until he port m in its revolution is covered by passing over the segments 9 g which closes the port until the next forward stroke'of the piston.

'I he exhaust steam during this as'sage has been escaping at the opposite encl 'of the cylinder, thIOt gh valve port 1" and plate ort a, thence throi gh the radial valve port into the steam chest and out throrgh the exit 0. When desired to reverse the motion of the engine, the valves U are forced inward until the port 1; rests over plate port a when valve port 1" will rest over plate port 0, steam then passes to the cylinder through the ports 0 and 1" with port I), the rotary valve in its passage will admit steam to the cylinder throu h its port m into port I) until the port m, in its revolution is covered by passing over the segments 9 g which closes the port until the next forward stroke of the piston. The exhaust steam during this passage has been escaping at the opposite end of the cylinder through valve port 1*, and plate port a, thence through the radial valve port N into the steam chest, and out through the exit 0. When desired to reverse the motion of the en e, the valves U are forced inward until t re port r rests over plate port a when valve port r will rest over plate port 0, steam then passes to the cylinder through the orts c andr, from slot f and exhausts at t e opposite end of the cylinder through valve ort 7', plate port a and through rotary va ve port N, into the steam chest.

What I claim as my invention and desire to secure by Letters Patent of the United States, is

1. Ina valve mechanism for engines impelled by steam under pressure, the combi nation, with a cylinder and piston reciprocating therein, of a steam-chest, rotary valves rotating in said steam-chest and havi'n annular exhaust ports near the periphery t ereof, and a port plate connected to said cylinder covering cylinder port's, the said port plate being provided at each end with two steam ports, and two exhaust ports whereby the steam is admitted to and from the cylinder ports, all beneath the said rotating valve, substantially as described.

2. In a valve mechanism for engines impolled by steam, the combination, with a. cylinder and piston reciprocating therein of a steam-chest, rotary valves rotating in said steam-chest and having annular exhaust ports near the periphery thereof, a steam chamber within the valves opening centrally throu h the face thereof into a port plate and provi ed with a steam port opening into annular grooves in a port plate, together with means for rotating the valves, substantially as described.

3. In a reciprocating steam-engine, the combination, with a; steam-chest, a cylinder rovided at each end with ports entering into the same, of a port plate secured to the port face of the cylinder, said port plate provided with qprts opening into the cylinder ports throng a suitable valve portion; and rotary valves rotating against the face of the port plate having annular exhaust ports therein, and provided witha steam chamber and a steam port for admitting steam to the ports in the port plate, substantially as and for the purposes described.

4. In a reciprocating steam-engine, the combination with a steam-chest, a cylinder having ports at each end entering into the same, 0 a port plate secured to the port face of the cylinder, annular oves in the port against the outer face of the port plate, subplate carrying segmenta sections, a pinion stantiallxasdcscribed. 10 engaging the sections, a rack having a stem In testimqny whereof I aflix my signature connected with a governor and engaging in presence of two witnesses.

a said pinion, ports through each annular JAMES F. HOPPER.

ve for the admission of steam to the ort Witnesses: ace of the cylinder and a rotary valve av- W. L. BROWN, ing steam and exhaust passages rotating Tnos. P. HOPPER. 

